Cisco Data Center Network Manager Multiple Authentication Bypass Vulnerabilities

Risk

High

Date Discovered

January 2, 2020

Description

Cisco Data Center Network Manager is prone to multiple authentication-bypass vulnerabilities. An attacker can exploit these issues to bypass authentication mechanism and perform unauthorized actions with administrative privileges. This may lead to further attacks. These issues are being tracked by Cisco bug IDs CSCvq85945, CSCvq89859 and CSCvq89898. Cisco Data Center Network Manager (DCNM) software versions prior to 11.3(1) are vulnerable.

Technologies Affected

  • Cisco Data Center Network Manager 10.0(1)
  • Cisco Data Center Network Manager 10.1(1)
  • Cisco Data Center Network Manager 10.2(1)
  • Cisco Data Center Network Manager 10.3(1)
  • Cisco Data Center Network Manager 10.4(1)
  • Cisco Data Center Network Manager 10.4(2)
  • Cisco Data Center Network Manager 11.0(1)
  • Cisco Data Center Network Manager 11.1(1)
  • Cisco Data Center Network Manager 11.2(1)

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn't needed, filter access to the affected device at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of exploits.

Run all software as a nonprivileged user with minimal access rights.
To limit the consequences of successful exploits, run server processes within a restricted environment using facilities such as chroot or jail.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.

References

Credits

Steven Seeley (mr_me) of Source Incite, working with Trend Micro’s Zero Day Initiative.


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